LOL WUT? Please enlighten me how a breather affects emissions, since they come out an exhaust with a CATALYTIC CONVERTER. Breathers don't emit emisisons.

all emissions system must be left intack and not modified, A hose is there to guild fumes back into the intake to be burn off, the breather will allow the fumes out into the atmosphere. Seems minor but its there for a reason. I cannot think of one car that has a beather on the valve cover stop that has been made in the longest time.